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Current Codonopsis cordifolioidea products are mostly its crude extract, which is of low technology content and low added value, and studies on the active ingredients of Codonopsis cordifolioidea are very limited. To promote industrial development of Codonopsis cordifolioidea product and to increase...

Maternal depression is recognized as a significant mental health problem in postpartum circumstances, particularly, prevalence may be considerably higher among low-income. The purpose of study was to identify average maternal postpartum depression and its predicting factors among low-income family during...

Flame retardant and mechanical properties of ammonium polyphosphate (APP), melamine phosphate (MP) and their combination with dipentaerythritol (DPER) in styrene-butadiene-styrene rubber (SBS) were studied. The results indicate that MP is more effective in raising limiting oxygen index (LOI) in SBS than...

Deep convolutional neural networks (CNNs) have recently shown impressive performance as generic representation for recognition. However, the feature extracted f¬rom global CNNs lack geometric invariance, which limits their robustness for classification and detection of highly variable objects .To improve...

Online learning is a learning way to use online education platform for learners. It could let the learners start learning at anytime from anywhere by removing the traditional education's time and space limit. As the online learning style becomes more and more popular, its main base environment has gradually...

The present study reports that a modified coaxial electrospinning process, which was successfully carried out to control the diameters of shellac fibers. With a Triton-X100 in ethanol as sheath working solution and shellac ethanol solution as a core electrospinnable fluid, the coaxial electrospinning...

Engaging in exploring multi-agent collaboration requires determining how to govern the shared activities. We examine the performance implications of selecting alternate modes of governance in multi-agent alliance relationships. A core set of results in this study relates to the ways in which governance...

This paper first analyzes the advantages and disadvantages of TF-IDF, which is a traditional algorithm of term weight calculation. Then to overcome the disadvantages of the algorithm, this paper proposes a new method of term weight calculation based on information gain and information entropy, which...

Star sensor is an important part of the attitude control of a space vehicle. The advantages and disadvantages of the optical system determine the accuracy of the whole star sensor system. In order to adapt to the development of China's space needs, a star sensor optical system was designed by a domestic...

This paper introduces a choice of lower complexity for two different filtering operations based on Filtered OFDM (F-OFDM). The first filtering operation is implemented by linear convolution in time domain, and the second one is realized by multiplication in frequency domain (fast convolution). They are...

How UI designers and business engineers collaborate to development apps on Android platform conveniently and effectively is a difficult problem to tackle when projects get more complicate and need more effort. This paper compared the commonality and variability of MVVM with the commonly used MVC and...

A new copper(I) complex, [Cu( Flu-imPhen)(POP)]PF6, where -Flu-imPhen = 1-(9H-fluoren-2-yl)-1H-imidazo[4,5-f][1,10]phenanthroline , POP=bis(2-diphenylphosphanyl)ether, was synthesized and characterized. The corresponding photophysical properties were investigated using UV-vis and emission spectrometry....

Computer has received more and more applications in various fields. In this paper, many new periodic wave solutions expressed by Jacobi elliptic functions of the Mikhauilov-Novikov- Wang (MNW) hierarchy are obtained by using the extended F-expansion method. In the limit cases, the obtained Jacobi elliptic...

This article investigates how appropriation cost and government expenditure would affect on income disparity from empirical aspects. Empirically, we use corruption perceptions indices and Gini coefficients of 129 countries or regions to estimate appropriation cost and income disparity respectively, and...

Since 2002, the number of registered trademark applications in China has consistently ranked first in the world. However, some scholars questioned whether massively registered trademarks had significant positive influences on enterprise competitiveness. From the perspective of trademark layout of enterprise...

How urbanization affects the regional economic development. And it has been praised by educational world attention, especially the current unbalanced development. This is not fully the most outstanding performance as the gap between urban and rural areas, and the main performance in the income gap between...

Under the background of the less connection between teachers and students in universities and the rapid development of the Internet, and according to the needs of students and teachers, the topic was to design and develop university research and academic platform prototype based on Android. First of...

As millimeter wave (MMW) electronic technologies have matured, MMW receiver research is also in the rapid development which includes front-end and frequency synthesizer. They all needed isolation between RF and DC bias. The good design bias T which can realize high isolation between DC bias source port...

In the paper, an algorithm based on Dual-Tree Complex Wavelet Transform is proposed for process denoising. Use the variance of the wavelet coefficients at different scales to estimate the parameters of process. Adopting Maximum a Posteriori estimator estimates the wavelet coefficients of process. The...

Building on the framework presented in The Nature of Creative Development (Stanford U. Press, 2006), I describe an approach for representing researchers' focuses of research activity in a field; the approach is based on use of a knowledge representation framework. Application is made to the field of...

Four books published by Birkhäuser are reviewed.

Seven books published by Birkhäuser are reviewed.

Three books are reviewed, namely Masao Nagasawa: Schroedinger Equations and Diffusion Theory. Birkhaeuser, Basel Boston Berlin, 1993. 332 pages. David Wick (with a mathematical appendix by William Farris): The Infamous Bounary - Seven Decades of Controversy in Quantum Physics. Birkhaeuser. Boston Basel...

License plate detection process can be divided in two parts 1] plate extraction, 2] character segmentation. License plate detection relies on illumination conditions, background and mainly on camera resolution. There is absence of any common standard to compare various algorithms for a LPD system, because...